The cheapskate robber used a Londis carrier bag with holes cut into it to hide his face

CCTV footage has been released showing the man entering the shop wearing a Londis bag with holes torn out of it for his eyes and mouth. He then threatens the woman assistant with a knife.

She opened the till which he proceeded to take banknotes from.

He then made off with the undisclosed sum, passing two startled shoppers on his way out of the Day One store in Hemel Hempstead, Herts.

The assistant was not injured in the incident which took place at 8.40am on May 9.

DC Paula Mowbray from the Local Crime Unit at Hemel Hempstead Police Station is investigating. She said: “This was a distressing incident for the owner of the store and we continue to make efforts to identify this man.

"It’s an unusual choice of disguise and clearly parts of his face are still on display which is why we’re releasing this footage in the hope that someone will know who he is.